CROSS CUTTING RELATIONSHIPS -...

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CROSS‐CUTTING RELATIONSHIPS

Sequence of Events ‐

Steno's Laws

Nicholas Steno (1669)

• Principle of Superposition

• Principle of Original Horizontality

These laws apply to both sedimentary and volcanic rocks.

Principle of Superposition

In a sequence of undisturbed layered rocks, the oldest rocks are on the bottom.

Fig. 10.3

Principle of Original Horizontality

Layered strata are deposited horizontal or nearly horizontal or nearly parallel to the Earth’s surface.

Earth Issues 10.1

Sequence of Events

education.usgs.gov/lessons/schoolyard/CoolGeologyActivity.html

Cross‐cutting Relationships

earthscienceinmaine.wikispaces.com/11.2+Relative+Ages+of+Rocks

evolution.berkeley.edu/evosite/evo101/IIE1Whathappenedwhen.shtml

volcano.oregonstate.edu/vwdocs/vwlessons/magma_pathways/act6.html

Fig. Story 10.11

PHYSICAL AND CHEMICAL WEATHERING

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DEPOSITIONAL SYSTEMS

From: SEPM Sequence Stratigraphy Web: sepmstrata.org/exercises.html

“Clastic Hierarchies”Christopher G. St. C. Kendall

Submarine Canyons & Deep Sea Fans

USGS Image

Offshore Los Angeles

sepmstrata.org/deepwater/DeepwaterClasticArchitecture.html

Clastic Depositional SystemsClastic Depositional Systems

sepmstrata.org/deepwater/DeepwaterClasticArchitecture.html

Tide‐Dominated Niger Delta

Geomorphologyof Coast

Delta Morphology

Meandering Fluvial System

Allen, 1964

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